Finding the Fourth Proportional to 23,601.38, 32,571.32 and 12,990.78

Step by Step Solution

1. Step 1: Write the proportion equation
   23,601.38 : 32,571.32 = 12,990.78 : x
2. Step 2: Convert to fraction form
   23,601.38/32,571.32 = 12,990.78/x
3. Step 3: Cross multiply
   23,601.38x = 32,571.32 × 12,990.78
4. Step 4: Simplify right side
   23,601.38x = 423,126,787.48
5. Step 5: Solve for x
   x = 423,126,787.48/23,601.38
6. Step 6: Final answer
   x = 17,928.06